Automatically Generating Static Mappings?

[ElectroPulse]

Hello, all!

I'm wondering… Is there a way to generate static mappings whenever a new user connects to the network?

At the very least, is there some way to take a list of MAC addresses and easily create a bunch of static mappings with that?

The reason I ask: I am managing a school network. I recently installed Sarg, and noticed it tracks usage based on IP address. Obviously, if a user's IP address is changing every day or two, this just won't work. There isn't much user turnover here, so I have no worries about running out of IP addresses (though I'd keep an eye on it, of course).

One suggestion that I ran across was this: Save the DHCP settings using the backup/restore tool, make the required changes, and then restore with the updated config.

I tried this, but here's my problem... How on earth would I go about automatically generating a form like this? (this is how it exported)

		 <staticmap><mac>MACADDRESS</mac>
			<ipaddr>IPADDRESS</ipaddr>
			 <hostname><filename><rootpath><defaultleasetime><maxleasetime><gateway><domain><domainsearchlist><ddnsdomain><tftp><ldap></ldap></tftp></ddnsdomain></domainsearchlist></domain></gateway></maxleasetime></defaultleasetime></rootpath></filename></hostname></staticmap> 

Thanks!
ElectroPulse